NXP Semiconductors MC9S08JS16CFK

Overview

MC9S08JS16CFK from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB flash, 512 B RAM, USB 2.0 full-speed interface, and 24-pin QFN package. It operates at up to 48 MHz CPU frequency and 24 MHz bus speed, supporting embedded control in USB-connected industrial sensors and low-power human-interface devices.

For engineers reviewing the MC9S08JS16CFK datasheet, MC9S08JS16CFK pinout, MC9S08JS16CFK application, or MC9S08JS16CFK equivalent, key selection considerations include its integrated USB transceiver with on-chip 3.3 V regulator, MCG clock generator with FLL/PLL, low-voltage detection thresholds (VLVD0 = 2.48–2.70 V), stop3 mode current (1.5 μA @ 5 V), and 24-pin QFN thermal resistance (θJA = 92 °C/W on 1s board).

Technical Context

The MC9S08JS16CFK implements the HCS08 CPU core with 48 MHz maximum operation and a multi-purpose clock generator (MCG) supporting internal reference trimming, FLL, and PLL modes. Its USB module complies with USB 2.0 full-speed (12 Mbps), includes dedicated 3.3 V regulator (VUSB33), and supports endpoint 0 plus six additional endpoints.

Peripherals include one SPI, one SCI with LIN master/slave break generation, one 2-channel 16-bit TPM with PWM and input capture, RTC with binary/decimal prescaler, CRC16-CCITT hardware engine, and 8-pin keyboard interrupt module. Power management features wait, stop2, and stop3 modes with RTC and LVD adders.

Key Specifications

Pinout & Package

MC9S08JS16CFK uses a 24-pin quad flat no-lead (QFN) package per case number 98ASA00734D, with exposed thermal pad and 0.5 mm pitch. The package supports automated reflow assembly and provides low thermal resistance (θJA = 92 °C/W on single-layer board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit USB microcontroller applications.

Compared with MC9S08JS16CLH, the MC9S08JS16CFK offers superior thermal performance in compact layouts; compared with S9KEAZ128AMLH, it delivers lower power and simpler firmware for cost-sensitive USB peripherals where 8-bit throughput suffices.

Availability

MC9S08JS16CFK is available at Aetrix Electronics and suitable for industrial sensor nodes, USB human interface devices, embedded debug adapters, and LIN-to-USB bridges requiring stable component supply and long-term manufacturability.

Supply support for MC9S08JS16CFK includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors acquired Freescale in 2015 and maintains the HCS08 portfolio for cost-sensitive, low-power embedded control applications.

The MC9S08JS16 series belongs to NXP's legacy 8-bit MCU product line, designed specifically for USB-enabled industrial and consumer peripherals where integration, ultra-low standby current, and debug simplicity are critical.

FAQ

What is the maximum operating frequency of the MC9S08JS16CFK CPU core?

The MC9S08JS16CFK CPU core runs at a maximum frequency of 48 MHz, with a corresponding 24 MHz internal bus frequency. This timing is achieved using the MCG's PLL mode with an external crystal or internal reference, and is fully supported across the –40°C to +85°C industrial temperature range specified in the datasheet.

Does the MC9S08JS16CFK include an integrated USB transceiver and voltage regulator?

Yes, the MC9S08JS16CFK integrates a full-speed USB 2.0 transceiver and a dedicated on-chip 3.3 V regulator (VUSB33). The regulator powers the USB PHY and includes a built-in 1.5 kΩ pull-up resistor on USBDP, enabling direct USB enumeration without external components.

What low-power modes does the MC9S08JS16CFK support, and what is its lowest current consumption?

The MC9S08JS16CFK supports Wait, Stop2, and Stop3 modes. In Stop3 mode with all modules disabled, it draws just 1.5 μA at 5 V and 25°C. Adding RTC functionality increases current by only 300 nA, making it ideal for battery-operated USB peripherals requiring infrequent wake-ups.

Is the MC9S08JS16CFK pin-compatible with other members of the MC9S08JS16 series?

Yes, the MC9S08JS16CFK shares the same 24-pin QFN pinout as MC9S08JS16 and MC9S08JS16L variants. All share identical peripheral mappings and electrical characteristics; only flash configuration (e.g., security settings) and qualification grade differ between suffixes.

What clock sources are supported by the MC9S08JS16CFK's MCG module?

The MCG supports crystal/resonator (32 kHz to 16 MHz), external square-wave clock (31.25 kHz to 40 MHz), and internal trimmed/untrimmed reference (31.25–39.0625 kHz). It provides FLL, PLL, and internal reference modes - enabling flexible clock tree design without external oscillators in most applications.